linux-kernel - [PATCH -next] drm/i915/display: Fix build error without DRM_FBDEV

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Message-ID: <20250315120143.2344958-1-yuehaibing@huawei.com>
Date: Sat, 15 Mar 2025 20:01:43 +0800
From: Yue Haibing <yuehaibing@...wei.com>
To: <jani.nikula@...ux.intel.com>, <rodrigo.vivi@...el.com>,
	<joonas.lahtinen@...ux.intel.com>, <tursulin@...ulin.net>,
	<airlied@...il.com>, <simona@...ll.ch>, <tzimmermann@...e.de>,
	<dev@...khorst.se>
CC: <intel-gfx@...ts.freedesktop.org>, <intel-xe@...ts.freedesktop.org>,
	<dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
	<yuehaibing@...wei.com>
Subject: [PATCH -next] drm/i915/display: Fix build error without DRM_FBDEV_EMULATION

In file included from <command-line>:
./drivers/gpu/drm/i915/display/intel_fbdev.h: In function ‘intel_fbdev_framebuffer’:
./drivers/gpu/drm/i915/display/intel_fbdev.h:32:16: error: ‘NULL’ undeclared (first use in this function)
   32 |         return NULL;
      |                ^~~~
./drivers/gpu/drm/i915/display/intel_fbdev.h:1:1: note: ‘NULL’ is defined in header ‘<stddef.h>’; did you forget to ‘#include <stddef.h>’?
  +++ |+#include <stddef.h>
    1 | /* SPDX-License-Identifier: MIT */
./drivers/gpu/drm/i915/display/intel_fbdev.h:32:16: note: each undeclared identifier is reported only once for each function it appears in
   32 |         return NULL;
      |                ^~~~

Build fails if CONFIG_DRM_FBDEV_EMULATION is n, add missing header file.

Fixes: 9fa154f40eb6 ("drm/{i915,xe}: Run DRM default client setup")
Signed-off-by: Yue Haibing <yuehaibing@...wei.com>
---
 drivers/gpu/drm/i915/display/intel_fbdev.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.h b/drivers/gpu/drm/i915/display/intel_fbdev.h
index ca2c8c438f02..89bad3a2b01a 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.h
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.h
@@ -6,6 +6,8 @@
 #ifndef __INTEL_FBDEV_H__
 #define __INTEL_FBDEV_H__
 
+#include <linux/types.h>
+
 struct drm_fb_helper;
 struct drm_fb_helper_surface_size;
 struct drm_i915_private;
-- 
2.34.1